50PJ350 SMPS STATIC TEST UNDER LOAD
50PJ350 SMPS STATIC TEST UNDER LOAD
Note:
Always test the SMPS under a
load using the 2 light bulbs.
Abnormal operational
conditions may result if not
loaded.
Check Pins 13 or 14
for 5V SBY (5.14V)
Check Pin 8 for
Error Det (4.9V)
Any time AC is applied to the SMPS, STBY 5V will be 3.46V and will
be 5.14V when the set turns on.
AC DET WILL NOT be present until set comes on.
If AC Det is missing, the TV will come on and shut off in 10 Seconds.
Check Pin 5,6 and 7
for (+5V) 5.17V
Check Pins 1 or 2 for
17V
P813
40
Using two 100 Watt light bulbs, attach one end to Vs and the other end to ground. Apply AC to SC101. If the light bulbs
turn on and VS is the correct voltage, allow the SMPS to run for several minutes to be sure it will operate under load. If
this test is successful and all other voltages are generated, you can be fairly assured the power supply is OK.
Note: To be 100% sure, you would need to read the current handling capabilities of each power supply listed on the silk
screen on the SMPS and place each supply voltage under the appropriate load.
Note:
To turn on the Power Supply;
1) With Main Board connected, press power.
2) Without Main Board connected SMPS will turn on automatically.
Gnd
VS
10
0W
100W
Check Pins 1 or 2
for Vs voltage
Check Pins 6 or 7
for Va voltage
P812
5
8
or
4
or
Pins
1
2
or
Pins
Check Pin 16 for
AC Det (4.44V)
July 2010 50PJ350 Plasma
L601
L602
F101
10A 250V
F302
2.5A
250V
F801
4A 250V
ZD302
D609
ZD401
P812
P813
SC101
T901
T902
T301
VA VS
Test Points
POWER SUPPLY
p/n: EAY60968701
VR502
VA Adj
VR901
VS Adj
